feat: e2e add pv expansion

[veezhang]

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

Description:

How do you solve it?

Special notes for your reviewer, ex. impact of this fix, design document, etc:

[veezhang]

There are also the following things that need to be dealt with:

1. need to update observedGeneration.
   update dynamic custom config but observedGeneration is not update #353 (comment)
2. need to add check whether pvc is deleted or not.
   Internal optimization #337 (comment)

[veezhang]

By manually updating observedGeneration, the test results are as follows:

--- PASS: TestNebulaCluster (574.22s)
    --- SKIP: TestNebulaCluster/scale_with_default_values (0.00s)
    --- SKIP: TestNebulaCluster/update_version (0.00s)
    --- SKIP: TestNebulaCluster/update_resources (0.00s)
    --- SKIP: TestNebulaCluster/custom_config_for_static (0.00s)
    --- SKIP: TestNebulaCluster/custom_config_for_dynamic (0.00s)
    --- SKIP: TestNebulaCluster/custom_config_thrift_port_and_http_port (0.00s)
    --- SKIP: TestNebulaCluster/tools_for_exporter (0.00s)
    --- SKIP: TestNebulaCluster/scale_with_zone (0.00s)
    --- SKIP: TestNebulaCluster/update_version_with_zone (0.00s)
    --- PASS: TestNebulaCluster/pv_expansion (224.11s)
        --- PASS: TestNebulaCluster/pv_expansion/Install_NebulaCluster (10.62s)
        --- PASS: TestNebulaCluster/pv_expansion/Wait_NebulaCluster_to_be_ready (57.27s)
        --- PASS: TestNebulaCluster/pv_expansion/Load_LDBC-SNB_dataset (111.62s)
        --- PASS: TestNebulaCluster/pv_expansion/Upgrade_NebulaCluster_update_storage_size (9.63s)
        --- PASS: TestNebulaCluster/pv_expansion/Wait_NebulaCluster_to_be_ready_after_upgrade_update_storage_size (22.42s)
        --- PASS: TestNebulaCluster/pv_expansion/Uninstall_NebulaCluster (8.81s)
    --- PASS: TestNebulaCluster/pv_expansion_with_EnablePVReclaim (350.11s)
        --- PASS: TestNebulaCluster/pv_expansion_with_EnablePVReclaim/Install_NebulaCluster (13.38s)
        --- PASS: TestNebulaCluster/pv_expansion_with_EnablePVReclaim/Wait_NebulaCluster_to_be_ready (61.91s)
        --- PASS: TestNebulaCluster/pv_expansion_with_EnablePVReclaim/Load_LDBC-SNB_dataset (116.10s)
        --- PASS: TestNebulaCluster/pv_expansion_with_EnablePVReclaim/Upgrade_NebulaCluster_update_storage_size (21.61s)
        --- PASS: TestNebulaCluster/pv_expansion_with_EnablePVReclaim/Wait_NebulaCluster_to_be_ready_after_upgrade_update_storage_size (128.11s)
        --- PASS: TestNebulaCluster/pv_expansion_with_EnablePVReclaim/Uninstall_NebulaCluster (7.77s)
PASS

[MegaByte875]

LGTM